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#include "bt_exception.h"
#include "yexception.h"
#include <util/system/backtrace.h>
#include <util/system/type_name.h>
#include <cxxabi.h>
#include <stdexcept>
#include <cstdio>
static void FormatExceptionTo(IOutputStream& out, const std::exception& exception) {
out << "(" << TypeName(exception) << ") " << exception.what();
}
TString FormatExc(const std::exception& exception) {
TStringStream out;
FormatExceptionTo(out, exception);
return out.Str();
}
TString CurrentExceptionMessage() {
auto exceptionPtr = std::current_exception();
if (exceptionPtr) {
try {
std::rethrow_exception(exceptionPtr);
} catch (const yexception& e) {
const TBackTrace* bt = e.BackTrace();
if (bt) {
return TString::Join(bt->PrintToString(), TStringBuf("\n"), FormatExc(e));
}
return FormatExc(e);
} catch (const std::exception& e) {
return FormatExc(e);
} catch (...) {
}
return "unknown error";
}
return "(NO EXCEPTION)";
}
Y_DECLARE_UNUSED static void FormatBackTraceTo(IOutputStream& out, const TBackTrace& backtrace) {
if (backtrace.size() == 0) {
out << "backtrace is empty";
return;
}
try {
backtrace.PrintTo(out);
} catch (const std::exception& e) {
out << "Failed to print backtrace: ";
FormatExceptionTo(out, e);
}
}
void FormatCurrentExceptionTo(IOutputStream& out) {
auto exceptionPtr = std::current_exception();
/*
* The lack of current exception indicates a logical bug in the client code.
* Do not make any attempts to workaround it, just panic and abort.
*/
Y_VERIFY(exceptionPtr != nullptr, "there is no current exception");
#ifdef _YNDX_LIBUNWIND_ENABLE_EXCEPTION_BACKTRACE
TBackTrace backtrace = TBackTrace::FromCurrentException();
#endif
try {
std::rethrow_exception(exceptionPtr);
} catch (const std::exception& e) {
out << "Caught:\n";
FormatExceptionTo(out, e);
out << "\n";
#ifdef _YNDX_LIBUNWIND_ENABLE_EXCEPTION_BACKTRACE
FormatBackTraceTo(out, backtrace);
#endif
return;
} catch (...) {
out << "unknown error\n";
return;
}
}
TString FormatCurrentException() {
TStringStream out;
FormatCurrentExceptionTo(out);
return out.Str();
}
bool UncaughtException() noexcept {
return std::uncaught_exceptions() > 0;
}
std::string CurrentExceptionTypeName() {
#if defined(_linux_) || defined(_darwin_)
std::type_info* currentExceptionTypePtr = abi::__cxa_current_exception_type();
if (currentExceptionTypePtr) {
return TypeName(*currentExceptionTypePtr);
}
#endif
//There is no abi::__cxa_current_exception_type() on Windows.
//Emulated it with rethrow - catch construction.
std::exception_ptr currentException = std::current_exception();
Y_ASSERT(currentException != nullptr);
try {
std::rethrow_exception(currentException);
} catch (const std::exception& e) {
return TypeName(typeid(e));
} catch (...) {
return "unknown type";
}
}
void TSystemError::Init() {
yexception& exc = *this;
exc << TStringBuf("(");
exc << TStringBuf(LastSystemErrorText(Status_));
exc << TStringBuf(") ");
}
NPrivateException::yexception::yexception() {
ZeroTerminate();
}
TStringBuf NPrivateException::yexception::AsStrBuf() const {
if (Buf_.Left()) {
return TStringBuf(Buf_.Data(), Buf_.Filled());
}
return TStringBuf(Buf_.Data(), Buf_.Filled() - 1);
}
void NPrivateException::yexception::ZeroTerminate() noexcept {
char* end = (char*)Buf_.Current();
if (!Buf_.Left()) {
--end;
}
*end = 0;
}
const char* NPrivateException::yexception::what() const noexcept {
return Buf_.Data();
}
const TBackTrace* NPrivateException::yexception::BackTrace() const noexcept {
return nullptr;
}
void fputs(const std::exception& e, FILE* f) {
char message[256];
size_t len = Min(sizeof(message) - 2, strlcpy(message, e.what(), sizeof(message) - 1));
message[len++] = '\n';
message[len] = 0;
fputs(message, f);
}
void ::NPrivate::ThrowYException(const ::NPrivate::TSimpleExceptionMessage& sm) {
throw sm.Location + yexception() << sm.Message;
}
void ::NPrivate::ThrowYExceptionWithBacktrace(const ::NPrivate::TSimpleExceptionMessage& sm) {
throw sm.Location + TWithBackTrace<yexception>() << sm.Message;
}
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